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163 citations found for Tamura,
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abstracts
research papers
Magnetic Compton scattering is applied to measure a spin-specific magnetic hysteresis loop.
research papers
research papers (metal-organic compounds)
research papers
A Zernike-type imaging microscope using a sputtered-sliced Fresnel zone plate has been developed and tested at an X-ray energy of 25 keV.
detectors
Preliminary measurements in a proportional counter with two independently counting wires showed that counting rates up to 106 counts s-1 wire-1 can be reached without critical loss in the `true versus measured' linearity relation. Results obtained with a detector containing 30 active wires (2 mm pitch) are presented. With each wire is associated a fast pre-amplifier and a discriminator channel. Global counting rates in excess of 107 events s-1 are reported. Dead-time losses are corrected by use of simple mathematical-modelling functions. Data-acquisition systems are described for one-dimensional (real-time) and two-dimensional (off-line) position-sensitive detection systems.
experimental methods and techniques
A multiwire proportional counter was used in fluorescence X-ray absorption measurements and a comparison to a Si(Li) and NaI(Tl) detectors was done. The main features of the mutiwire proportional counter are its high counting rate capability (107 counts s-1) and large active area (6 × 6 cm2). It was shown that the MWPC is suitable for fluorescence absorption. Although the maximum capability was not reached in the present experiments, it was found that as the counting rate increase the MWPC performance became better than Si(Li) detectors and shows a similar response to the scintillator counter at medium counting rates (up to 105 counts s-1).
abstracts
research papers
A high-molecular-weight protease complex called trilobed protease (TLP) was recently discovered in the archaeon P. furiosus. The crystal structure of the N-terminal ![[beta]](http://scripts.iucr.org/logos/entities/beta_rmgif.gif)
-propeller domain of the trilobed protease at 2 Å resolution shows that the trilobed protease utilizes this accessory domain to control substrate access to the active site.
-propeller domain of the trilobed protease at 2 Å resolution shows that the trilobed protease utilizes this accessory domain to control substrate access to the active site.research papersA high-molecular-weight protease complex called trilobed protease (TLP) was recently discovered in the archaeon P. furiosus. The crystal structure of the N-terminal -propeller domain of the trilobed protease at 2 Å resolution shows that the trilobed protease utilizes this accessory domain to control substrate access to the active site.
-propeller domain of the trilobed protease at 2 Å resolution shows that the trilobed protease utilizes this accessory domain to control substrate access to the active site.research papers
The energy-dispersive X-ray absorption spectroscopy beamline of the Brazilian Synchrotron Light Laboratory has been described and its potentiality as a tool for material science investigation has been demonstrated.
abstracts
abstracts
abstracts
research papers
The feasibility of exploiting the features of Laue microdiffraction to characterize the structures of inorganic materials by using data collected on several randomly oriented stationary microcrystals is demonstrated.
abstracts
abstracts
research papers
A new method to determine the energy-dependent variation of the X-ray flux of a synchrotron beamline based on the comparison between observed intensities and the calculated intensities of a well known structure has been developed.
abstracts
research papers
Laue single-crystal and monochromatic powder micro-diffraction mappings are combined to describe the organization of the crystalline phases in archaeological artefacts at the micrometre scale, in relation with the physical properties of these heterogeneous materials.
